Novel sludge concentration device

Abstract

The utility model discloses a novel sludge thickening device which comprises a gear motor mounted in the center of the top of a sludge tank through a mounting beam, a cone part is arranged at the bottom of the sludge tank, a blow-off pipe is further arranged on the bottom wall of the sludge tank, and a central rotating shaft is fixedly connected to the bottom of the gear motor. The bottom of the central rotating shaft is fixedly connected with the bottom wall of the sludge tank through a bearing support, a stirring device and a cement reflecting device are sequentially arranged on the periphery of the central rotating shaft from top to bottom, the stirring device comprises a plurality of groups of symmetrically arranged stirring arms, and wavy stirring blades are obliquely arranged on the stirring arms. The bottom of the stirring blade is bent towards the direction far away from the central rotating shaft to form a bent plate, the sludge concentration equipment disclosed by the utility model is simple in structure, and three main parameters, namely the spiral angle of the stirring arm of the stirring device, the width of the paddle and the angle of the stirring shaft, can be adjusted aiming at different sludge concentration tanks.

Description

TECHNICAL FIELD

[0001] The utility model relates to sludge concentration and sedimentation technical field especially a kind of new sludge concentration device. BACKGROUND

[0002] Sludge concentration tank is an important functional monomer in various sewage treatment systems, and the method of sludge concentration is mainly divided into three kinds of gravity concentration, air floatation concentration and mechanical concentration. Due to the advantages of low operating cost and convenient operation of gravity concentration, at present, domestic domestic sewage sludge concentration mainly uses gravity concentration, but the hydraulic retention time of gravity concentration tank is long, and sludge will release phosphorus in anaerobic state in the tank. In most cases, the supernatant of sludge produced in the process of gravity concentration is returned to the water treatment structure for treatment in the sewage plant using denitrification and phosphorus removal process, and then the phosphorus pollutants circulate in the system. This is one of the important reasons for the high phosphorus load of sewage treatment plant, and it is also one of the reasons for the low phosphorus removal efficiency of biological phosphorus removal in the whole sewage treatment system. In order to ensure that the effluent meets the standard, the consumption of subsequent chemical phosphorus removal must be increased, and the operating cost is increased. On the other hand, for other sewage with high pollutant concentration, such as breeding wastewater, traditional Chinese medicine manufacturing wastewater, landfill leachate and the like, which is treated by biochemical method, and domestic sewage with high sludge concentration due to improper operation, the sludge concentration efficiency often needs to be improved. In this case, air floatation, mechanical concentration and other process methods with higher cost need to be used, or the capacity of sludge concentration tank needs to be increased, and the construction cost is increased. SUMMARY

[0003] In order to solve the problems in the prior art, a new sludge concentration device is provided to solve the problems of low sludge concentration efficiency and high construction cost in the prior art.

[0004] To solve the above technical problems, the technical scheme adopted by the utility model is as follows: a new sludge concentration device, comprising a speed reducer motor installed at the top center position of a sludge tank through a mounting beam, wherein the bottom of the sludge tank is provided with a cone part, and the bottom wall of the sludge tank is further provided with a sewage discharge pipe; the bottom of the speed reducer motor is fixedly connected with a central shaft, the bottom of the central shaft is fixedly connected with the bottom wall of the sludge tank through a bearing support, and the outer periphery of the central shaft is sequentially provided from top to bottom with a stirring device and a cement reflection device; the stirring device comprises a plurality of groups of symmetrically arranged stirring arms, the stirring arms are obliquely provided with wave-shaped stirring blades, and the bottom of the stirring blade is bent to form a bent plate away from the central shaft.

[0005] Preferably, the stirring arm comprises a plurality of blade fixing rods arranged on the central shaft, the plurality of blade fixing rods are sequentially arranged from top to bottom, and the plurality of blade fixing rods comprise a first fixing rod, a second fixing rod and a third fixing rod; the stirring blades are fixed through the plurality of blade fixing rods.

[0006] Preferably, the cement reflection device is an umbrella-shaped arc plate, and a plurality of mud grooves are arranged on the cement reflection device and are symmetrically distributed.

[0007] Preferably, a conical receiving hopper is arranged at the bottom of the sludge pool in a central position, and the bottom of the conical receiving hopper is in communication with a sludge discharge pipe of the bottom wall of the sludge pool.

[0008] Preferably, the stirring blade is arranged in a wave arc shape, and the angle of the arc bending on the stirring blade is 5°-30°.

[0009] Preferably, the bending plate is the same in structure as the stirring blade, and forms a bending included angle of 120°-175°.

[0010] The utility model has the advantages of:

[0011] 1. Compared with the existing grid type sludge thickener and other sludge thickening equipment of the same type, the thickening equipment disclosed by the utility model obviously improves the efficiency of the gravity thickening pool, the sludge water is stirred by the stirring arm with a specific angle and in a spiral shape on the stirring device, the sludge water forms obvious downward vortex flow, which helps the aggregation and downward flow of the sludge, and after the downward vortex flow is reflected on the reflection device, the sludge water with small density flows upward, and the sludge with large density enters the conical receiving hopper along the mud groove on the reflection device, so that the separation of the sludge water is accelerated, and the separation effect of the sludge water is obviously higher than that of the existing equipment.

[0012] 2. Compared with the existing grid type sludge thickener and other sludge thickening equipment of the same type, the sludge thickening equipment disclosed by the utility model is simple in structure, and for different sludge thickening pools, the spiral angle of the stirring arm of the stirring device, the width of the paddle and the angle of the stirring shaft can be adjusted, so that the standardized equipment suitable for the size of the sludge thickening pool can be manufactured, and the gravity thickening pool can also be reformed on site. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the sludge thickening equipment of the utility model in a sludge thickening pool.

[0014] Figure 2 It is a structural view of a stirring arm of the stirring device in the utility model.

[0015] Figure 3 It is a schematic view of the stirring blade.

[0016] Figure 4 It is a connection top view of a plurality of symmetric stirrings on a central stirring shaft.

[0017] Figure 5 It is a top view of the sludge water reflection device.

[0018] Figure: 1, the speed reducer motor; 2, the center rotating shaft; 3, the stirring device; 4, the mud reflection device; 5, the cone hopper; 6, the sewage pipe; 34, the stirring blade; 35, the bending plate; 100, the mounting beam; 200, the pool wall; 300, the cone part; 401, the mud groove 401; 500, the collection hopper; 3101, the stirring arm 3101. DETAILED DESCRIPTION

[0019] The utility model will be described in further detail below in combination with the drawings and specific embodiments.

[0020] As Figures 1-5 shown, a new sludge thickening device, including the speed reducer motor 1 installed in the sludge pool top center position through the mounting beam 100, the sludge pool bottom is provided with the cone part 300, the sludge pool bottom wall is also provided with the sewage pipe 6, the speed reducer motor 1 bottom is fixedly connected with the center rotating shaft 2, the center rotating shaft 2 bottom is fixedly connected with the sludge pool bottom wall through the bearing support, the center rotating shaft 2 periphery is sequentially provided with the stirring device 3 and the cement reflection device 4 from top to bottom, the stirring device includes several groups of symmetrically arranged stirring arms 3101, the stirring arm 3101 is provided with the wave-shaped stirring blade 34 on the inclination, the stirring blade 34 bottom is bent to form the bending plate 35 away from the center rotating shaft 2 direction, the embodiment is, as Figure 1 shown, the sludge pool inner wall is installed with the pool wall 200, and the sludge pool bottom is installed with the cone part 300, the speed reducer motor 1 is fixed when installation through the mounting beam 100, the mounting beam 100 is generally composed of two parallel steel and installation platform, as the general equipment of the top-mounted stirring type mechanical equipment of sewage treatment pool, the upper end of the center rotating shaft 2 is connected with the speed reducer and is fixed by the mounting beam 100, and the bottom is connected with the sludge pool bottom wall through the bearing support, to ensure that the center rotating shaft 2 rotates, the stirring device 3 and the cement reflection device 4 rotate coaxially under the driving of the stirring shaft, the stirring device 3 has several symmetric stirring arms 3101 around the center rotating shaft 2, as Figure 4 shown, Figure 4 the connection of multiple symmetric stirring arms 3101 on the center stirring shaft is a top view, and the stirring device is generally symmetrically connected with 2-8 stirring arms 3101 on the center rotating shaft 2, as Figure 2 shown, the stirring blade 34 is inclined to the center rotating shaft 2 direction, and the bottom is bent to form the bending plate 35 away from the center rotating shaft 2 direction, the bending plate 35 is the same as the structure of the stirring blade 34, and the bending setting of the stirring blade 34 can further strengthen the rotational kinetic energy, and the main purpose is to form the downward vortex flow after the mud mixture is stirred in the stirring process and guide to the mud reflection device 4, the cone part 300 belongs to the conventional design for sludge collection accumulation of the sludge pool.

[0021] The stirring arm 3101 comprises a plurality of blade fixing rods arranged on the central rotating shaft 2, which are arranged in decreasing length from top to bottom, including a first fixing rod 31, a second fixing rod 32, and a third fixing rod 33, and the stirring blades 34 are fixed by the plurality of blade fixing rods. Figure 2 As shown, the number of fixing rods for stretching connection and fixation can be less than 3 or more than 3 depending on the length, width, thickness, and material of the blades. The specific structure of the stirring arm 3101 is that the stirring blades 34 are fixed and connected by a plurality of blade fixing rods with decreasing length.

[0022] Preferably, the cement reflecting device 4 is an umbrella-shaped arc plate, and a plurality of mud grooves 401 are arranged on the cement reflecting device 4, which are symmetrically distributed, as shown. Figure 5 As shown, the distribution of 2-5 mud grooves 401 is shown respectively, and each structure is symmetrically distributed. The specific structure of the cement reflecting device 4 is an umbrella-shaped arc plate, which mainly blocks and prevents water from penetrating downward. Specifically, when the stirring device 3 rotates, it drives the sludge water to form a vortex. Since the sludge density is greater than that of water, it is located at the lower position in the vortex. At this time, the sludge contacts the cement reflecting device 4 below and accumulates. Then, the sludge is deposited downward through the mud grooves 401 on the cement reflecting device 4. The cement reflecting device 4 acts to improve the efficiency of sludge-water separation and further concentrate the sludge. When in use, the vortex sludge-water mixture formed by the stirring device 3 is adsorbed by the sludge in the mud-water mixture, and the stirring device 3 drives the water with a smaller density at the bottom of the sludge pool to flow upward, while the sludge-water mixture with a larger density descends along the mud grooves 401 to the cone receiving hopper 5, achieving accelerated separation of sludge and water. At the same time, the sludge-water reflecting device 4 can accelerate the efficiency of sludge-water separation in reality, and also can avoid the vortex generated by the stirring device when rotating from driving the bottom sludge upward, further improving the efficiency of sludge-water separation.

[0023] Preferably, the cone receiving hopper 5 is arranged at the center of the bottom of the sludge pool, and the bottom of the cone receiving hopper 5 is in communication with the sludge discharge pipe 6 of the bottom wall of the sludge pool. The outer peripheral angle of the cone receiving hopper 5 is consistent with the angle of the conical part 300 of the sludge pool. The structure of the cone receiving hopper 5 is funnel-shaped, including a funnel part 500, and a lower drain pipe is fixedly connected below the funnel part 500. The lower drain pipe is in communication with the sludge discharge pipe 6 at the bottom of the sludge pool for sludge discharge.

[0024] Preferably, the stirring blades 34 are arranged in a wavy arc shape, and the arc bending angle of the stirring blades 34 is 5°-30°, as shown. Figure 3As shown, the arc angle of the stirring blade is 5°-30° (and the included angle with the central axis), and the main purpose is to stir the sludge-water mixture to form a downward vortex flow.

[0025] Preferably, the bending plate 35 is the same structure as the stirring blade 34 and forms an included angle of 120°-175°, and the bending structure can further guide the downward vortex flow of the sludge to the sludge-water reflection device 4.

[0026] The working principle of the present application is that the sludge-water mixture in the sludge concentration tank is stirred downward by the stirring device to promote the downward aggregation of the sludge, and the sludge-water mixture meets the convex reflection device in the downward flow, the sludge-water mixture with small density is reflected back to the upper part of the sludge concentration tank, and the sludge-water mixture with large density is attached to the surface of the reflection plate and enters the cone receiving hopper or the conical part of the sludge concentration tank along the sludge groove, thereby achieving the effect of sludge-water separation.

[0027] The above-mentioned embodiments are only preferred technical solutions of the present application, and should not be regarded as a limitation of the present application, and the protection scope of the present application should be the technical solutions recited in the claims, including the equivalent replacement solutions of the technical features recited in the claims as the protection scope. That is, the equivalent replacement improvement within this range is also within the protection scope of the present application.

Claims

1. A novel sludge concentration device, comprising a speed reducer motor (1) installed at the top center position of a sludge pool through a mounting beam (100), wherein a cone part (300) is arranged at the bottom of the sludge pool, a sludge discharge pipe (6) is further arranged at the bottom wall of the sludge pool, a central rotating shaft (2) is fixedly connected to the bottom of the speed reducer motor (1), and the bottom of the central rotating shaft (2) is fixedly connected with the bottom wall of the sludge pool through a bearing support, characterized in that, The outer periphery of the central rotating shaft (2) is sequentially provided from top to bottom with a stirring device (3) and a cement reflecting device (4), the stirring device comprises a plurality of groups of symmetrically arranged stirring arms (3101), the stirring arms (3101) are provided with wave-shaped stirring blades (34) in an inclined manner, and the bottom of the stirring blades (34) is bent away from the central rotating shaft (2) to form a bent plate (35).

2. A novel sludge thickener as claimed in claim 1, wherein: The stirring arms (3101) comprise a plurality of blade fixing rods arranged on the central rotating shaft (2), the blade fixing rods are sequentially arranged in a gradually shortened manner from top to bottom, and are respectively a first fixing rod (31), a second fixing rod (32) and a third fixing rod (33), and the stirring blades (34) are fixedly connected through the blade fixing rods.

3. A novel sludge thickener as claimed in claim 1, wherein: The cement reflecting device (4) is an umbrella-shaped arc plate, a plurality of mud grooves (401) for passing sludge are arranged on the cement reflecting device (4), and the mud grooves (401) are symmetrically distributed.

4. A novel sludge thickener as claimed in claim 1, wherein: A conical material receiving hopper (5) is arranged at the bottom of the sludge pool in a central position, and the bottom of the conical material receiving hopper (5) is in communication with a sludge discharge pipe (6) of the bottom wall of the sludge pool.

5. A novel sludge thickener as claimed in claim 1, wherein: The stirring blades (34) are arranged in a wave-shaped arc manner, and the arc bending angle of the stirring blades (34) is 5°-30°.

6. A novel sludge thickener as claimed in claim 1, wherein: The bent plate (35) has the same structure as the stirring blades (34) and forms a bent included angle of 120°-175°.

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